//a3 posted. This week lab is very important for A3. Review the lab
//before going to the lab, and try to finish it during the lab hours

TicTacToe t = new TicTacToe();
t.toString()
t.setMark('X', 0, 0)
t.toString()
t.setMark('X', 0, 1)
t.setMark('X', 0, 2)
t.toString()
//let's write rowWinner() that determines if there is any row winner
t.rowWinner()
TicTacToe t = new TicTacToe();
t.setMark('X', 0, 2)
t.setMark('X', 0, 1)
t.setMark('X', 0, 0)
t.toString()
t.rowWinner()

TicTacToe t = new TicTacToe();
t.setMark('X', 1, 1)
t.setMark('X', 0, 1)
t.setMark('X', 2, 1)
t.toString()
t.colWinner()

TicTacToe t = new TicTacToe();
t.setMark('X', 0, 0)
t.setMark('X', 1, 1)
t.setMark('X', 2, 1)
t.toString()
t.diagWinner()
t.setMark('X', 2, 2)
t.toString()
t.diagWinner()

TicTacToe t = new TicTacToe();
t.setMark('O', 0, 2)
t.setMark('O', 1, 1)
t.setMark('O', 2, 0)
t.toString()
t.diagWinner()
t.getWinner()